THE LUMBAIt CURVK IN SOME AMERICAN RACES. 



63 



Of this mean general index of 100.6 it is worth while 

 to note that in only one instance does any male index 

 fall below this figure ; while no female index equals it- 

 In fact the range in both sexes among the Songish is 

 very slight, the highest index in the males being 104.7, 

 and in the females the lowest is 98.2. The sum of the 

 anterior measurements in the males averages 126 mm. ; 

 the maximum being 150 mm., the minimum 115 mm. 



3. CHINOOK. TABLE VII. ONE MALE, FOUR FEMALES. 



Of course it is barely possible that the mean geiieial 

 index, 101.5, would be slightly raised if there had not 

 been such a disproportionately large number of females 

 to the males ; but a larger number of measurements of 

 the spines of both sexes would not, in all probal)ility, 

 have raised the index above 102. 



The variations in the four Chinook females are very 

 slight, the highest general index being 100, the lowest 

 97.7. The average sum of the anterior measurements in 

 the male is 134 mm., of the posterior 140 mm. The aver- 

 aire sum of the anterior measurements of the females is 

 127 mm. ; the highest being 137 mm., the lowest 126nim. 

 Of the sum of the posterior measurements, the average is 

 125 mm., the highest being 127 mm., and the lowest 

 120 mm. 



